CN212584714U

CN212584714U - LNG stores feeding device

Info

Publication number: CN212584714U
Application number: CN202021139113.7U
Authority: CN
Inventors: 刘进; 赵周
Original assignee: Zhangjiagang Aipu Energy Equipment Co ltd
Current assignee: Zhangjiagang Aipu Energy Equipment Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-02-23
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses an LNG storage and supply device, which comprises an outer tank and an inner tank, wherein a heat preservation layer is filled between the inner tank and the outer tank to reduce heat circulation and protect the inner tank, the inner tank is communicated with an air-adding pipe, the left end of the inner tank is communicated with a first air outlet pipe, the first air outlet pipe passes through a heat exchanger, the first air outlet pipe passes through the heat exchanger and then is communicated with a first buffer tank, the outer side of the first buffer tank is provided with an annular heating layer, the first buffer tank is heated, the first buffer tank is communicated with the second buffer tank, the upper end of the second buffer tank is connected with the second air outlet pipe, liquefied LNG is added into the inner tank through the air adding pipe, the inner tank is placed in the heat insulation layer and the outer tank, the multilayer protection effect is achieved, meanwhile, heat exchange is carried out through the heat exchanger, heat is fully utilized, the heat exchanger is prevented from being frozen, and meanwhile, partial gaseous natural gas is stored through the arrangement of the first buffer tank and the second buffer tank, and the use of high-power devices is met.

Description

LNG stores feeding device

Technical Field

The utility model relates to a technical field is supplied with in the LNG storage, specifically is a LNG storage feeding device.

Background

At present, new energy automobiles are in the process of being fired, the technology of the new energy automobiles is also gradually improved, and LNG automobiles are new-generation natural gas automobiles taking low-temperature liquid natural gas as fuel, and have the outstanding advantages that the LNG energy density is high, the automobile driving range is long and can reach more than 400km, and the LNG automobile has obvious economic benefits compared with the automobiles using diesel oil and gasoline.

However, before LNG is used, LNG needs to be converted into gaseous natural gas through heat exchange, temperature rise and gasification, since LNG is low-temperature liquid at about-162 ℃, freezing points of some conventional refrigerants such as brine, glycol aqueous solution, ammonia gas and the like are high, ice is frozen due to local supercooling when the LNG is subjected to heat exchange, and an ice layer tends to thicken along with the prolonging of time, the heat transfer performance of a heat exchange device is deteriorated, and LNG cannot be smoothly gasified, so that the LNG heat exchanger is a key device for realizing LNG gasification. Therefore, the utility model provides a LNG storage feeding device to solve the problem that proposes in the above-mentioned background art.

Disclosure of Invention

An object of the utility model is to provide a LNG storage feeding device to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an LNG storage and supply device comprises an outer tank and an inner tank, wherein a heat insulation layer is filled between the inner tank and the outer tank, heat circulation is reduced, the inner tank is protected, an air adding pipe is communicated with the inner tank, the left end of the inner tank is communicated with a first air outlet pipe, the first air outlet pipe penetrates through a heat exchanger and then is communicated with a first buffer tank, an annular heating layer is arranged on the outer side of the first buffer tank, the first buffer tank is heated, the first buffer tank is communicated with a second buffer tank, the upper end of the second buffer tank is connected with a second air outlet pipe, the second buffer tank is added with liquefied LNG through the air adding pipe, the inner tank is exhausted through the first air outlet pipe, the second air outlet pipe is provided with a solenoid valve and a control switch, and a low-temperature;

the heat exchanger is characterized in that a box body is arranged on the outer side of the heat exchanger and is internally divided into a front cavity and a rear cavity, parallel heat absorption cavities are arranged in the cavities, electromagnetic valves are arranged at the right ends of the heat absorption cavities, temperature sensors are mounted on the heat absorption cavities to monitor the working state of the heat absorption cavities, the right ends of the heat absorption cavities are connected to a first air outlet pipe through a three-way pipe, the left ends of the heat absorption cavities extend out of the heat exchanger and are connected to a first buffer tank after being converged through a three-way pipe, outer pipes which are respectively communicated with the two cavities are arranged at the right ends of the heat exchanger and extend to the upper part of the heat exchanger, the electromagnetic valves are mounted on the outer pipes and are used for controlling the flow of the two cavities, a heating assembly is connected at the left end of the outer pipes in a converging mode through the three-, the heat exchange efficiency is improved.

As a further proposal of the utility model, the heat exchanger is of a U shape, and cooling fins are arranged between the heat exchanger for quickening the heat transfer.

As the utility model discloses scheme further again, the heat absorption cavity is for the parallel slice cavity is constituteed, and the circulation has heat transfer medium between the adjacent heat absorption cavity, guarantees that the heat transfer is abundant.

As the utility model discloses scheme further again, be equipped with a plurality of heating rings in the heating element, the diameter of heating ring crescent, be heat transfer medium's circulation pipeline between the heating ring, fully heat the heat transfer medium who flows through.

As the utility model discloses scheme further again, the fan is installed to the downside of outer jar, and the fan is just to the fin, and the upside of outer jar is equipped with the air outlet, carries out the heat transfer through the air flow, controls inside temperature.

As a further aspect of the present invention, the heat exchange medium is brine or glycol aqueous solution.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a place the inner tank inside heat preservation layer and outer jar, play the effect of multilayer protection, simultaneously, carry out the heat transfer through the heat exchanger, abundant utilization heat, the heat exchanger of avoiding freezes.

2. The utility model discloses a buffer tank one and buffer tank two set up the natural gas of storage part gaseous state, satisfy the use of high-power device once.

Drawings

Fig. 1 is a schematic structural diagram of an LNG storage and supply apparatus.

Fig. 2 is a schematic top view of a heat exchanger in an LNG storage and supply apparatus.

Fig. 3 is a schematic perspective view of a heat exchanger in an LNG storage and supply device.

In the figure: 1. an outer tank; 2. a heat-insulating layer; 3. an inner tank; 4. an air adding pipe; 5. a first air outlet pipe; 6. a heat exchanger; 7. a first buffer tank; 8. a second buffer tank; 9. a second air outlet pipe; 10. a fan; 11. an air outlet; 12. an outer tube; 13. a box body; 14. a heating assembly; 15. a heat absorbing cavity; 16. a heat sink; 17. and a circulating pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, in an embodiment of the present invention, an LNG storage and supply device includes an outer tank 1 and an inner tank 3, a heat preservation layer 2 is filled between the inner tank 3 and the outer tank 1 to reduce heat circulation and protect the inner tank 3, the inner tank 3 is communicated with an air adding pipe 4, the left end of the inner tank 3 is communicated with a first air outlet pipe 5, the first air outlet pipe 5 passes through a heat exchanger 6, the first air outlet pipe 5 passes through the heat exchanger 6 and then is communicated with a first buffer tank 7, the outer side of the first buffer tank 7 is provided with an annular heating layer, heating the first buffer tank 7, wherein the first buffer tank 7 is communicated with the second buffer tank 8, the upper end of the second buffer tank 8 is connected with the second gas outlet pipe 9, liquefied LNG is added into the inner tank 3 through the gas adding pipe 4, the inner tank 3 is discharged through the first gas outlet pipe 5, the air outlet pipe II 9 of the air adding pipe 4 is provided with an electromagnetic valve and a control switch, and a low-temperature ball valve is arranged at the joint of the buffer tank I7 and the connecting air outlet pipe I5;

the heat exchanger 6 is U-shaped, the radiating fins 16 are arranged between the heat exchangers 6 and used for accelerating heat transfer, the outer side of the heat exchanger 6 is provided with a box body 13, the box body 13 is divided into a front cavity and a rear cavity, side-by-side heat absorption cavities 15 are arranged in the cavity, the heat absorption cavities 15 are formed by side-by-side sheet cavities, a heat exchange medium flows between the adjacent heat absorption cavities 15 to ensure sufficient heat exchange, electromagnetic valves are arranged at the right ends of the heat absorption cavities 15, temperature sensors are arranged on the heat absorption cavities 15 and used for monitoring the working state of the heat absorption cavities 15, the right end of the heat absorption cavity 15 is connected to the first air outlet pipe 5 through a three-way pipe, the heat exchanger 6 extends from the left end of the heat absorption cavity 15 and then is connected to the first buffer tank 7 after being converged through a three-way pipe, the outer pipe 12 which, all install the solenoid valve on the outer tube 12 for the flow of two cavitys of control, the left end of outer tube 12 is joined through the three-way pipe and is connected with heating element 14, and heating element 14's left end is connected with the pipeline, and the pipeline extends to the left end middle part of heat exchanger 6, and circulating pump 17 is installed to the tip of pipeline, accelerates heat transfer medium's flow through circulating pump 17, improves heat exchange efficiency, be equipped with a plurality of heating rings in the heating element 14, the diameter of heating ring increases gradually, is heat transfer medium's circulation pipeline between the heating ring, fully heats the heat transfer medium that flows through, fan 10 is installed to the downside of outer jar 1, and fan 10 is just to fin 16, and the upside of outer jar 1 is equipped with air outlet 11, carries out the heat transfer through the air flow, controls inside temperature, heat transfer medium is.

The utility model discloses a theory of operation is: during the use, through gas filling pipe 4, in adding inner tank 3 with liquefied LNG, protect through heat preservation 2 and outer jar 1, LNG in the inner tank 3 is discharged through outlet duct one 5, when flowing through heat exchanger 6, absorb heat through heat absorption cavity 15, LNG intensification vaporization, get into in buffer tank one 7, get into in buffer tank two 8 after carrying out further intensification again, obtain the vaporized natural gas that can use, temperature sensor through in the heat exchanger 6 monitors the temperature of heat absorption cavity 15, near reaching the freezing point, reduce the admission of corresponding cavity through the solenoid valve, and increase heat transfer medium's flow through the solenoid valve in the heat exchanger 6 outside, accelerate the heat transfer, make heat exchanger 6 be in best operating condition all the time.

The utility model discloses a place inner tank 3 in heat preservation 2 and outer jar 1 inside, play the effect of multilayer protection, simultaneously, carry out the heat transfer through heat exchanger 6, abundant utilization heat, the heat exchanger 6 of avoiding freezes, simultaneously, through buffer tank 7 and two 8 set up the natural gas of storage part gaseous state, satisfies the use of high-power device once.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The LNG storage and supply device comprises an outer tank (1) and an inner tank (3), and is characterized in that a heat insulation layer (2) is filled between the inner tank (3) and the outer tank (1), heat circulation is reduced, the inner tank (3) is protected, the inner tank (3) is communicated with a gas adding pipe (4), the left end of the inner tank (3) is communicated with a first gas outlet pipe (5), the first gas outlet pipe (5) penetrates through a heat exchanger (6), the first gas outlet pipe (5) penetrates through the heat exchanger (6) and then is communicated with a first buffer tank (7), the outer side of the first buffer tank (7) is provided with an annular heating layer, the first buffer tank (7) is communicated with a second buffer tank (8), the upper end of the second buffer tank (8) is connected with a second gas outlet pipe (9) and adds liquefied LNG to the inner tank (3) through the gas adding pipe (4), the inner tank (3) is provided with the second gas outlet pipe (5), and the gas adding, a low-temperature ball valve is arranged at the joint of the first buffer tank (7) and the first connecting air outlet pipe (5);

the heat exchanger is characterized in that a box body (13) is arranged on the outer side of the heat exchanger (6), the box body (13) is internally divided into a front cavity and a rear cavity, heat absorption cavities (15) are arranged side by side in the cavities, electromagnetic valves are arranged at the right ends of the heat absorption cavities (15), a temperature sensor is arranged on the heat absorption cavities (15), the right ends of the heat absorption cavities (15) are connected to a first air outlet pipe (5) through a three-way pipe, the left ends of the heat absorption cavities (15) extend out of the heat exchanger (6) and are connected to a first buffer tank (7) after being converged through the three-way pipe, an outer pipe (12) which is respectively communicated with the two cavities is arranged at the right ends of the heat exchanger (6) and extends to the upper part of the heat exchanger (6), the electromagnetic valves are arranged on the outer pipe (12), a heating component (14) is converged at the left end of the outer pipe (12), the end of the pipeline is provided with a circulating pump (17).

2. LNG storage feed according to claim 1, characterized in that the heat exchangers (6) are U-shaped, and that fins (16) are provided between the heat exchangers (6).

3. LNG storage supply according to claim 1, characterised in that the heat absorption chambers (15) are formed as side-by-side plate-like cavities, and that a heat exchange medium is circulated between adjacent heat absorption chambers (15).

4. LNG storage and supply arrangement according to claim 1, characterized in that the heating unit (14) is provided with heating rings of increasing diameter, between which are flow channels for the heat exchange medium.

5. LNG storage and supply arrangement according to claim 1, characterised in that the lower side of the outer tank (1) is provided with a fan (10), the fan (10) facing the cooling fins (16) and the upper side of the outer tank (1) being provided with air outlets (11).

6. The LNG storage supply of claim 3, wherein the heat exchange medium is brine or an aqueous glycol solution.